Extensible stovepipe.



W. F. BHOOKSHIRE.

EXTENSIBLE STOVEPIP. APPLicATIoN FILED sEPT.23.-'i913.

' -rns COLUMBIA PLA Patented J une` 27, 1916.

WILLIAM F. BROOKSIIIRE, OF BUFFALO, ILLINOIS.

EXTENSIBLE STOVEPIPE.

Application led September 23, 1913.

T o all whom 'may concern Be it known that I, HLLIAM F. BROOK- sHniE, a citizen of the United States, residing at Buffalo, in the county of Sanga- 'mon and State of Illinois, have invented new and useful Improvements in Extensible Stovepipes, of which the following is a specification.

This invention relates to eXtensible stove pipes and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide pipe sections with means whereby the said sections may be readily moved longitudinally with relation to each other and when at desired adjusted positions securely engage each other whereby they are held at the proper points of adjustment.

Vith the above object in view the pipe sections are made slightly smaller in diameter at their upper ends than at their lower ends. The upper end of one section is designed to fit in the lower end of the other section in the usual manner and these sections are provided at their sides with internal projections which are adapted to engage each other whereby the said sections are held at adjusted positions.

In the accompanying drawings Figure 1 is a side elevation of the pipe. Fig. 2 is a transverse sectional view of the same. Fig. 3 is a longitudinal sectional view of a portion of the same.

The stove pipe comprises sections A and B which are of the same general configuration. These sections are made slightly less in diameter at their upper ends than atr their lower ends and the upper end of the section B is adapted to fit in the lower end of the section A. rI`he section A is provided in the vicinity of its upper' end with the usual bead 1. The upper portion of the section A is adapted to be inserted in another section of a stove pipe in the usual manner and the lower end of the section B may receive the end portion of a length of stove pipe.

The section A is provided in the vicinity of its lower end with several rows of internal projections 2. These rows are preferably three in number positioned at equal distances about the circumference of the section A and the number of projections in each set is preferably two. The section B is provided in the vicinity of its upper end with several sets of depressions 3. These Specification of Letters Patent.

Patented June 27, 1916.

Serial No. 791,409.

sets are preferably three in number and preferably the number of depressions amounts to twelve. The section B is Vprovided in the vicinity of its lower end with several sets of internal projections 4L and these projections correspond in number and position with the depressions 2 at the lower end of the section A. The projections and depressions 2, 3 and #I are of the same general configuration and they include relatively long inclined sides 5 and relatively short sides 6 which are disposed in planes approximately at right angles to the axes of the sections A and B. Vhen the sections A and B are adjusted with relation to each other the short side 6 of the projections 2 and depressions 3 engage each other whereby the said sections are held at adjusted position. These sections have sufficient spring or elasticity to permit of relative endwise movement when a mallet or other instrument is used for knocking or driving the sections in proper position withrelation to each other but the projections 2 and depressions 3' have sufficient frictional contact with each other in order to hold'the said sections at adjusted positions against the usual strain or weight. Therefore it will be seen Vthat a. longitudinally eXtensible stove pipe is provided and in the event that the range of adjustment of the sections A and B is insufficient a second section B (not shown) may be inserted in the lower end of the section B (shown) and thus the two sections B may be adjusted with relation to each other and the section A may be adjusted with relation to that section B with which it is directly connected.

Having described the invention what is claimed is A stove pipe comprising sections, one of whichis provided between its ends and in the vicinity of one end with internal projections having long and short sides disposed at obtuse angles to `cach other and at different angles to the axis of the said pipe section. and the other pipe section provided between its ends and in the vicinity of one end with external depressions having long and short sides disposed at obtuse angles to each other and at diderent angles to the axis of the second mentioned pipe section, the end of the second mentioned pipe section which is adjacent the said depressions being in the form of a continuous circle and adapted to fit snuglyin the end of the first mentioned section which is provided with the projections, the diameter of the second mentioned section gradually increasing in length from the said end which .is adjacent the depressions to a point beyond the end ot' the set of depressions Which'is distant from the adjacent end of the said second mentioned pipe section, said sections adapted to telescopically engage each other, whereby the internal 'projections of the rst mentioned section may enter the external depressions of the second mentioned section, and the sectioneI being of Such relative diameter and coniguration that When they are engaged With each other the projections are in the depressions, the entire arca of the inner surface of the overlapping portions of the onter sections is in close contact With the entire outer surface of the overlapping portion of the inner section, both ot' said sections from the opposite sides of their respective projections and depressions being of unbroken circular configuration in cross Section.

In testimony whereof I affix my si gnature in presence of two witnesses.

VILLAM F. BROOKSHRE: Titnesses J. L. SHAR'rzER, S. M. OsENfroN.

@epics ef this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, 2D. G. 

